To dynamic hierarchical listview, push the new list item data into the existing
dataSource using
the select event.
Refer to the following steps to load list item into the child list:
select event that
triggers selecting list item in the ListView control. By using the select event, you can push the new list item to the child
list of the data source on specifying its item index. Item index can be obtained from the
SelectEventArgs of the
select event.var dataSource = [
{
id: '01', text: 'Music', icon: 'folder',
child: [
{ id: '01-01', text: 'Gouttes.mp3', icon: 'file' }
]
},
{
id: '02', text: 'Videos', icon: 'folder',
child: [
{ id: '02-01', text: 'Naturals.mp4', icon: 'file' },
{ id: '02-02', text: 'Wild.mpeg', icon: 'file' },
]
},
{
id: '03', text: 'Documents', icon: 'folder',
child: [
{ id: '03-01', text: 'Environment Pollution.docx', icon: 'file' },
{ id: '03-02', text: 'Global Water, Sanitation, & Hygiene.docx', icon: 'file' },
{ id: '03-03', text: 'Global Warming.ppt', icon: 'file' },
{ id: '03-04', text: 'Social Network.pdf', icon: 'file' },
{ id: '03-05', text: 'Youth Empowerment.pdf', icon: 'file' },
]
},
{
id: '04', text: 'Pictures', icon: 'folder',
child: [
{
id: '04-01', text: 'Camera Roll', icon: 'folder',
child: [
{ id: '04-01-01', text: 'WIN_20160726_094117.JPG', icon: 'file' },
{ id: '04-01-02', text: 'WIN_20160726_094118.JPG', icon: 'file' },
{ id: '04-01-03', text: 'WIN_20160726_094119.JPG', icon: 'file' }
]
},
{
id: '04-02', text: 'Wind.jpg', icon: 'file'
},
{
id: '04-02', text: 'Stone.jpg', icon: 'file'
},
{
id: '04-02', text: 'Home.jpg', icon: 'file'
},
{
id: '04-02', text: 'Bridge.png', icon: 'file'
}
]
},
{
id: '05', text: 'Downloads', icon: 'folder',
child: [
{ id: '05-01', text: 'UI-Guide.pdf', icon: 'file' },
{ id: '05-02', text: 'Tutorials.zip', icon: 'file' },
{ id: '05-03', text: 'Game.exe', icon: 'file' },
{ id: '05-04', text: 'TypeScript.7z', icon: 'file' },
]
},
];
//Initialize ListView component
var listviewInstance = new ej.lists.ListView({
//Set defined data to dataSource property
dataSource: dataSource,
//Map appropriate columns to fields property
fields: { iconCss: 'icon', tooltip: 'text' },
//Set true to show icons
showIcon: true,
//Set header title
headerTitle: 'Folders',
//Set true to show header title
showHeader: true,
//select event to add new list item in child page
select: onSelect
});
//Render initialized ListView
listviewInstance.appendTo("#listview");
//select event to add new list item in child page
function onSelect(args) {
//add new file to the child page of selected list item
this.dataSource[args.index].child.push({ id: '01-02', text: 'Newly Added File', icon: 'file', htmlAttributes: { role: 'li', class: 'list' } });
}<!DOCTYPE html><html lang="en"><head>
<title>Essential JS 2 for ListView </title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="Essential JS 2 for ListView UI Control">
<meta name="author" content="Syncfusion">
<link href="index.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-base/styles/material.css" rel="stylesheet">
<link href="//cdn.syncfusion.com/ej2/21.2.3/ej2-lists/styles/material.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/21.2.3/dist/ej2.min.js" type="text/javascript"></script>
</head>
<body>
<div id="container">
<div id="listview"></div>
</div>
<script>
var ele = document.getElementById('container');
if(ele) {
ele.style.visibility = "visible";
}
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>#container {
visibility: hidden;
}
#loader {
color: #008cff;
height: 40px;
width: 30%;
position: absolute;
font-family: 'Helvetica Neue','calibiri';
font-size: 14px;
top: 45%;
left: 45%;
}
#listview {
display: block;
max-width: 350px;
margin: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}
#listview.e-listview .e-list-icon {
height: 24px;
width: 30px;
}
.folder,.file {
background: url('//ej2.syncfusion.com/demos/src/listview/images/file_icons.png') no-repeat;
background-size: 302%;
}
.folder{
background-position: -5px -466px;
}
.file {
background-position: -5px -151px;
}
/* csslint ignore:start */
.list {
color:deeppink !important;
}
/* csslint ignore:end */